What weapon made castles useless?

Medieval-style fortifications were largely made obsolete by the arrival of cannons in the 14th century. Fortifications in the age of black powder evolved into much lower structures with greater use of ditches and earth ramparts that would absorb and disperse the energy of cannon fire.



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Castles were great defences against the enemy. However, when gunpowder was invented the castles stopped being an effective form of defence. By the end of the 1300s gunpowder was widely in use. The medieval castle with its high vertical walls was no longer the invincible fortification it had been.

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The entrance to the castle was always its weakest point. Drawbridges could be pulled up, preventing access across moats. Tall gate towers meant that defenders could shoot down in safety at attacks below. The main gate or door to the castle was usually a thick, iron-studded wooden door, that was hard to break through.

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However, the timber castles did have disadvantages. They were very vulnerable to attacks using fire and the wood would eventually start to rot. Due to these disadvantages, King William ordered that castles should be built in stone. Many of the original timber castles were replaced with stone castles.

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Converted into a donjon around 950, Château de Doué-la-Fontaine in France is the oldest standing castle in Europe.

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As a result, true castles went into decline and were replaced by artillery forts with no role in civil administration, and country houses that were indefensible.

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And indeed, the White Heron Castle, as it is sometimes called for its wing-like roofs and white walls, still stands today with its medieval foundations still wholly intact. It has survived the strife of the Muromachi period, the bombing of Himeji during World War II, and even catastrophic earthquakes.

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Arrow slits, also known as loopholes, were narrow openings in castle walls that allowed archers to shoot arrows at attackers while remaining protected behind the walls. These openings were designed to be very narrow, which made it difficult for attackers to shoot back, and also provided protection for the archers.

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Soldiers either scaled walls with ladders or overran castle walls breached by tunnels, battering rams, or artillery. Sometimes they attacked two or three spots around the castle at once to surprise their foe or divide castle defenses, and sometimes they approached the wall hidden within a trench or tunnel.

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Although they were frequently attacked, castles were the safest dwellings of the time. A castle was typically built on the top of a hill to protect the community from invasions.

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